window.Func = {
    //文档高度
    getDocumentTop: function () {
        var scrollTop = 0, bodyScrollTop = 0, documentScrollTop = 0;
        if (document.body) {
            bodyScrollTop = document.body.scrollTop;
        }
        if (document.documentElement) {
            documentScrollTop = document.documentElement.scrollTop;
        }
        scrollTop = (bodyScrollTop - documentScrollTop > 0) ? bodyScrollTop : documentScrollTop;
        return scrollTop;
    },

    //可视窗口高度
    getWindowHeight: function () {
        var windowHeight = 0;
        if (document.compatMode == "CSS1Compat") {
            windowHeight = document.documentElement.clientHeight;
        } else {
            windowHeight = document.body.clientHeight;
        }
        return windowHeight;
    },

    //滚动条滚动高度
    getScrollHeight: function () {
        var scrollHeight = 0, bodyScrollHeight = 0, documentScrollHeight = 0;
        if (document.body) {
            bodyScrollHeight = document.body.scrollHeight;
        }
        if (document.documentElement) {
            documentScrollHeight = document.documentElement.scrollHeight;
        }
        scrollHeight = (bodyScrollHeight - documentScrollHeight > 0) ? bodyScrollHeight : documentScrollHeight;
        return scrollHeight;
    },
    //去掉所有的html标记
    delHtmlTag: function (str) {
        return str.replace(/<[^>]+>/g, "");
    },
    //去掉所有的html标记和&nbsp;
    delHtmlAndNbsp (str) {
        return str.replace(/<[^>]+>|&nbsp;/g, "");
    }
};
